Base coat for metal objects
SUBSTANCE: base coat contains chlorine-containing polymer, pigment, plasticiser, organic solvent and rust solvent. The base coat also contains a texturing agent, a dispersing agent and an imidazole derivative. The chlorine-containing polymer used is a vinylchloride copolymer and components are in the following ratio, wt %: vinylchloride copolymer 10-20; plasticiser 3-6; texturing agent 0.2-0.6; dispersing agent 0.2-0.6; pigment 10-25; modifier-rust solvent 5-10; imidazole derivative 0.2-3.0; organic solvent - the rest.
EFFECT: use of the invention allows for depositing a base coat on an unprepared surface in a wide temperature range.
12 cl, 2 tbl
The invention relates to chemistry, and in particular to protective coatings of metal products used in oil, gas, energy, chemical and other industries. The coating can be applied on an unprepared surface and operates in a wide temperature range.
Known water-and organic-compounds for priming metal surfaces subject to corrosion. These include, for example, water-soil-rust converters VD-VA-0112 copyright certificate of the USSR No. 329773, 1966 or UNICOR - 1, UNICOR - 2 copyright certificate of the USSR No. 1019842, 1981 halasana compositions can be applied to the surface only at positive temperatures (up to +5°C), have insufficient protective properties and require overlap anticorrosive enamel.
Similar primer on organic basis have a higher protective properties, such as primer EP-0191 (USSR author's certificate No. 1334703, 1992).
Also known primer-modifiers rust-based epoxy resin, pigments, fillers, modifiers, solvents, amine hardener. These include primer according to the author's certificate of the USSR No. 895073 based on epoxy resin, dibutyl phthalate with modifier rust Converter - pyrocatechin, or as the development of the certificate of the USSR No. 1334703 with modifier octadecylsilane salt mechanicalengineer acid.
However, primer based on epoxy resins have two significant drawbacks: not applied at low temperatures (up to +5°C) and prior to application require hardener, that is a two-component coating.
Free from these defects, the formulations based on polymer solutions. An example is that the primer is based on the chlorine-containing polymer (chloroprene rubber), plasticizer, alkylphenolethoxylates resin in an organic solvent, an active filler in the form of magnesium oxide, MDI and modifier mixture of pyridine complexing agents with orthophosphoric acid (patent RF №2011670 - prototype). The advantages of this primer is the possibility of application at low temperatures. However, it cannot be applied on wet or oily surface, i.e. the necessary preliminary preparation of the surface, and also requires the coating in multiple layers due to the small thickness of one layer.
The objective of the proposed solutions is the possibility of priming the unprepared surface in a wide temperature range, including negative, and in one layer by increasing the thickness of the coating.
To solve the problem in the ground-enamel for coating metal articles, which comprises a chlorine-containing polymer, order the tel, pigment, plasticizer, organic solvent and modifier-rust entered structuring additive, a dispersant and a derivative of imidazole, and as a chlorine-containing polymer includes a copolymer of vinyl chloride, in the following ratio, wt.%:
|copolymer of vinyl chloride||10-20|
Under the unprepared surface refers to the surface without pre-treatment, i.e. containing moisture, rust and oil stains.
To ensure the coating on such surface in the applied composition should contain rust converters and components, crowding out n the surface moisture. Compositions containing such components were specified in the monograph of Grinberga A.S., ICCO AF and Kalinsky T.M. "anti-Corrosion primer. LLC NEPHRONS", St. Petersburg, 2006, s. Description primers applied on oily surfaces in the literature are missing.
The possibility of applying and film forming at low temperatures can be achieved using solutions of polymers in volatile solvents.
To obtain a thick coating in one application, the composition should contain additives that create structural viscosity, reducing the swelling on the surface.
In the primer as the basis for the film forming composition used with a copolymer of vinyl chloride, in particular, vinyl acetate, containing hydroxyl or carboxyl group, and vinyl chloride with a simple vinyl ether.
The composition is prepared as follows. Copolymer of vinyl chloride is mixed with an organic solvent, the solution is added plasticizer, pigments, fillers and dispersed in a ball or bead mills. To facilitate dispersion in the solution add a special substance. When sufficient dispergirovannom pigments and fillers mixing is produced in a high-speed dissolver.
As the solvent use is a mixture of aromatic solvents, acetone and acetates.
To absorb moisture from the surface, in addition to the hydrophilic acetone use of the additive alcohols. To displace moisture from the surface of the added amino compounds components.
To improve the coating adhesion to oily surfaces using imidazole derivatives based on fatty acids AND-5M-6M commonly used for curing epoxy resins.
Quality indicators proposed composition was tested as follows.
To determine the possibility of priming the oily surface of the metal was applied using a spray solution of grease in gasoline, and then dried for 2-3 hours at room temperature. Samblanet samples was determined by weighing samples before applying primer. The value of samblanet should be from 5 to 20 g/m2. On oily within the specified limits, the surface was applied the primer, which were then dried at room temperature. Adhesion primer for oily surface was determined by the method of cross-hatch test.
To determine the ability of the application of the proposed primer at negative temperatures used refrigeration chamber with a temperature of minus 18-20°C. the samples previously subjected to corrosion, then moistened with water and samelevel rastvorosmesitelnoj lubrication. The thus treated samples were placed in the refrigerating chamber.
The primer was applied on the sample surface outside the chamber brush, when this was controlled so that the surface temperature of the samples did not rise above -10°C. After priming the samples were again placed in the refrigerating chamber. After drying, the adhesion was determined by the method of cross-hatch test.
In table 1 examples of implementing the claimed composition.
|№ name of the component||%|
|Caponier vinyl chloride|
|- with the hydroxyl-containing vinyl acetate And-15-0||14|
|from simple vinyl ether||17,8||11,8||-||-|
|with vinyl acetate carboxylate the containing||to 12.0|
|- chloroparaffin||the 5.7||4,5||-||-|
|- acetone||of 5.4||18,0||13,3||13,5|
|- butyl acetate||8,4||14,6||15,3||14,5|
|- isopropyl alcohol||-||-||1,3||-|
|- titanium dioxide||-||1,8||-||2,1|
|- pigment red iron oxide||-||-||13,3||-|
|- chromium oxide||-||-||-||the 11.6|
|- carbon technical||3,3||0,9||-||-|
|- zinc phosphate||8,5||7,4||-||5,3|
|6. Dispersant Texaphor YP-3098||0,5||0,6||0,5||0,3|
|7. Structuring additive:|
|8. The rust Converter Korrodur||the 5.7||4,5||5,5||5,1|
|9. The derivative of imidazole AND-6M||0,5||2,7||2,3||1,3|
Table 2 shows the results of determining the effect is elicina samblanet surface properties of the primer composition of example 1.
|Samblanet, g/m2||Drying time at 20°C up to degree 3, min||The adhesion score||The hardness through the day, Rel. Units|
|18,5||60||The film is soft,the||0,08|
|destroyed when the test|
As can be seen from the table, when samblanet to 10-12 g/m2properties primers are slightly changed when the value of samblanet above 18 g/m2due to absorption of oil primer softens.
Thus, the proposed composition is provided which opens the possibility of priming the unprepared surface in a wide range of temperatures, including negative, and by increasing the thickness of one layer.
1. The ground-enamel for coating metal articles containing chlorine-containing polymer, filler, pigment, plasticizer, organic solvent and modifier-rust Converter, characterized in that it further comprises structuring additive, a dispersant and a derivative of imidazole, and as a chlorine-containing polymer includes a copolymer of vinyl chloride in the following ratio, wt.%:
|copolymer of vinyl chloride||10-20|
2. The ground-enamel according to claim 1, characterized in that the plasticizer used chlorine is arafin.
3. The ground-enamel according to claim 1, characterized in that the plasticizer used dioctylphthalate.
4. The ground-enamel according to claim 1, characterized in that the pigment used is titanium dioxide.
5. The ground-enamel according to claim 1, characterized in that the pigment used chromium oxide.
6. The ground-enamel according to claim 1, characterized in that the pigment used carbon technical.
7. The ground-enamel according to claim 1, characterized in that the pigment used zinc phosphate.
8. The ground-enamel according to claim 1, characterized in that it comprises pigment red iron oxide.
9. The ground-enamel according to claim 1, characterized in that the filler used talc.
10. The ground-enamel according to claim 1, characterized in that as a structuring additives used are presented.
11. The ground-enamel according to claim 1, characterized in that as a structuring additives used Panel.
12. The ground-enamel according to claim 1, characterized in that as a rust Converter used Korrodur.
SUBSTANCE: invention relates to a cold drying wear-resistant polymer composition, which can be used for protecting metal and concrete structures, for making floors and for other purposes. The composition contains the following components with their ratio given in pts. wt: 100 epoxy resin, 30.0 to 60.0 modifier, 40.0 to 80.0 flake reinforcement, 5.0 to 10.0 aerosil and/or 1.0 to 20.0 microtalc, 8.0 to 28.0 amine hardening agent. If necessary, the composition can contain a solvent in amount of up to 120 pts. wt. The modifier is butadiene-nitrile low-molecular rubber, or polysulphide rubber, or acrylic resin. The flake reinforcement is flaked silicon or iron mica. The amine hardening agent is a product of condensing N-methylol caprolactam with an aliphatic amine hardening agent, selected from a group which consists of diethylene triamine, triethylene tetraamine, polyethylene polyamine, or a mixture of the above mentioned product of condensing aliphatic amine, selected from a group which consists of diethylene triamine, tetraethylene tetraamine, polyethylene polyamine, and/or with organosilicon amine.
EFFECT: invention increases resistance to type B-3V synthetic oils, light resistance, adhesion to metal or concrete, elasticity, wear-resistance, hardness.
2 tbl, 11 ex
SUBSTANCE: invention relates to heat-insulating coatings. The anticorrosion and heat-insulating coating is made from a water-suspension composition with viscosity ranging from 1 to 100 Pa·s. The water-suspension composition contains a mixture of 5 to 95 vol. % polymer binder with 5 to 95 vol % hollow microspheres. The polymer binder is a water-emulsion polymer latex composition, which contains from 10 to 90 vol. % (co)polymer, selected from a group which includes acrylate homopolymer, styrene-acrylate copolymer, butadiene-styrene copolymer, polystyrene, butadiene polymer, polychlorovinyl polymer, polyurethane polymer, vinylacetate polymer or copolymer, or their mixture and from 10 to 90 vol % mixture of water and surface active substance. The hollow microspheres are in form of microspheres with different sizes from 10 to 500 micrometres and different packed density from 50 to 650 kg/m3, selected form a group which includes hollow glass microspheres, hollow ceramic microspheres, hollow polymer microspheres, hollow technogenic microspheres or their mixture. The water-suspension composition also contains a mixture of polyatomic alcohol with polybasic carboxylic or amino acid in equimolecular ratio.
EFFECT: longer service life of composition in harsh climatic and industrial conditions.
2 tbl, 1 ex
SUBSTANCE: invention is related to materials for protection against corrosion of pipeline metal surfaces and electric cables in metal casing, and also to materials for sealing of accumulators. Mastic based on asmol contains oil dissolvent, ASM glue, plasticiser, bivinyl styrene thermoplastic elastomer DST and syndiotactic 1.2 polybutadiene. Mastic may additionally contain chalk.
EFFECT: mastic has high resistance to loads due to increase of its strength characteristics, when mastic is applied onto polymer base, possibility is provided to use tape at low temperatures (up to -20°C).
2 cl, 1 tbl
SUBSTANCE: filming agent represents distillation residue of 4,5,6,7-tetrahydroindole production.
EFFECT: filming agent is highly adhesive to metals and protects them efficiently against corrosion.
1 cl, 4 ex
SUBSTANCE: invention relates to compositions for coating base metals, to coating obtained from the said compositions, as well as to the method of obtaining the said compositions. The coating composition contains an aqueous mixture, containing particles, stable towards acids, and one or several fluoro-acids, where content of particles stable towards acids ranges from 0.005 to 8 wt % in terms of dry mass. The base metal coating contains particles, stable towards acids, attached to the base by a metal oxide matrix. Specific density of the base metal coating ranges from 5 to 50 mg/ ft2 (53.82 - 538.2 mg/m2). The method of producing the composition involves production of particles stable towards acids and one or several fluoro-acids, mixture of the said particles stable towards acids and one or several fluoro-acids in water, where pH of the coating composition ranges from 2 to 7, and content of particles stable towards acids in the coating composition ranges from 0.005 to 8 wt % in terms of dry mass.
EFFECT: invention allows for production of coating compositions, which significantly reduce the level corrosion of objects, containing several base metals.
40 cl, 3 dwg, 7 tbl, 20 ex
SUBSTANCE: epoxy composition is intended for obtaining anti-corrosion coatings on products and reservoirs from concrete, reinforced concrete, metallic constructions. Composition includes following components, with their ratio, wt %: 47.4-54.4 of epoxy-diane resin ED-20, 2.8-4.3 of modifier, 19.6-27.0 of solvent, 21.7-22.8 of amine hardener. As modifier composition contains polyisocyanate based on 4,4'-diphenylmethandiisocyanate. As solvent composition contains solvent R-4. As hardener composition contains aromatic polyamine "Aramine".
EFFECT: increase of water-resistance and resistance of composition to impact of acids and alkalis.
2 tbl, 4 ex
SUBSTANCE: anticorrosive composition for primer coat contains finely dispersed powder of zinc, polystyrene and/or styrene copolymer with rubber used as a binding agent, aromatic solver and 4,4'-diphenylmethanediisocyanate additionally. The method of anticorrosive treatment is carried out by applying over preliminary treated surface at least one primer coat prepared from the mentioned above composition with further applying at least one finishing coat.
EFFECT: preparation of one-package anticorrosive composition, flowability and plasticity of which is unchanged in water presence, providing high anticorrosive and chemical stability of treated surface designed for using articles in the conditions of continuous contact with water medium and atmosphere, having of higher mechanical and adhesive properties and providing with decreased material consumption during coat formation.
3 cl, 5 tbl, 5 ex
SUBSTANCE: method consists in applying coating on polymer composition onto metal surface, where polymer composition is made on base of reactive resins, and in successive solidifying; in addition, there is used polymer composition containing micro-capsules with corrosion inhibitor preliminary introduced in micro-capsules from inert sorbent and/or inert sorbent with polymer shell of 1-100 mcm size. The micro-capsule with corrosion inhibitor used for protection of metal surfaces is made out of inert sorbent with polymer shell into pores of which corrosion inhibitor is impregnated and/or the capsule is covered with polymer shell produced by means of sedimentation of film forming substance from solution.
EFFECT: method facilitates upgrading degree of anticorrosion protection of coated metal surface due to continuous dozed release of inhibitor during operation of coating and due to constancy of inhibitor properties in coating; also method increases adhesion and strength of coating, reduces inhibitor consumption and localises selectivity of its effect.
9 cl, 2 dwg, 1 tbl, 4 ex
SUBSTANCE: anticorrosive coating compound with high content of non-volatile components containing a major component (A) containing epoxy resin (a1) and polymerised monomer (a3) (meth)acrylate, and curing component (B) containing alicyclic amine hardener (b1) and/or Mannich base-type hardener (b2); component (A) and/or component (B) contains at least either an additive (a2) chosen from epoxidated reactive diluents and modified epoxy resins, and a modifier (ab) of coating film chosen from petroleum polymer resins, xylene resins, coumarone resins, terpene-phenolic resins and vinyl chloride copolymers. Anticorrosive coating compound with high content of non-volatile components, particularly quick-set compound is characterised by content of organic solvents with boiling temperature 150°C and higher. Essentially it does not contain organic solvents with boiling temperature 150°C or lower.
EFFECT: compound is used to coat all time of the year regardless of temperatures due to quick drying and sufficient viability and has good low-temperature curability.
59 cl, 9 tbl
SUBSTANCE: acrylic paint system as a acrylic filming agent contains methylmethacrylate copolymer and H-butylmethacrylate resin Degalan LP64/12, and alkyd urethane varnish, dibutylphthalate or chloroparaffine CP-470 as a plasticising agent, pigments, calcite filler, toluene and butylacetate as an organic solvent, organic derivative of montmorillonite Bentone SD-2 as a thickening agent, mixed natural phospholipids Soya lecithin as a dispersant. The system additionally contain antirust pigment Phosmet that is mixed hydrated aluminium and calcium phosphates, or Polyphosmet that is aluminium and calcium polyphosphates compounds, talc as a filling agent, siccative and surface-active substance polymethylsiloxane liquid in the declared ratio.
EFFECT: acrylic system is characterised with high spreading capacity of dry film and static resistance.
2 tbl, 11 ex
FIELD: chemical industry, paint-vehicle systems, in particular heat protective dyes.
SUBSTANCE: claimed dye contains ceramic and corundum microspheres; resins, selected from group including silicone resin, polyesterepoxy resin, acrylic resin dispersions as binder; pigment; and aluminum powder as deflector. Such composition provides reduced heat loss into environment. Obtained dyes have thermal gradient, improved heat-retention properties and strength, and useful in corrosion and heat-loss protection of building construction, transport, gas and oil lines, heating systems, etc.
EFFECT: easier method for dye production; strength and homogenous heat protective dye layer of improved adhesiveness.
2 cl, 3 tbl
FIELD: polymer materials and corrosion protection.
SUBSTANCE: invention relates to cold-drying anticorrosive coating compositions, which can be used in petroleum, gas, power, chemical, and other industries for protection surfaces of iron articles and structures. Composition of invention is based on binder, namely alkyd-styrene resin or poor alkyd resin in amount 11.0-44.0%. Composition further comprises 0.3-5.0% tannin or tannin derivatives as anticorrosive additive, 3.0-24.0% pigments, 5.0-22.-% fillers, and balancing amount of organic solvent.
EFFECT: enhanced protective properties.
4 cl, 2 tbl, 5 ex
FIELD: corrosion protection.
SUBSTANCE: protective ground paint for painting coiled metal and electrochemical protection of bridges, power lines, and other long term-use metallic structures contains, wt %: epoxide resin 9.0-29.0, polyamide resin 3.0-9.5, pigment 23.0-36.0, zinc nanoparticle preparation 3.0-5.0, filler 13.0-23.2, and solvent - the balance. Zinc nanoparticle preparation is introduced in the form of (0.4-4)x·10-3 M solution in isooctane.
EFFECT: enhanced protective properties.
2 tbl, 4 ex
FIELD: pipeline heat insulation in civil and industrial building.
SUBSTANCE: coating composition includes 5-95 vol.% of polymeric binder and 5-95 vol.% of hollow microspheres. At least one composition layer is coated onto substrate and dried. Said polymeric binder contains 10-90 % of (co)polymer selected from acrylate homopolymer, styrene-acrylate copolymer, butadiene-styrene copolymer, polyvinylchloride, polyurethane, vinylacetate polymer or copolymer or mixture thereof. Binder also contains 10-90 vol.% of water and surfactant mixture. hollow microspheres have particle size of 10-500 mum and bulk density of 50-650 kg/m3, and made from glass, ceramic, polymers, sol or mixture thereof.
EFFECT: improved corrosion resistance and heat insulation of coated substrate; increased adhesion properties.
5 cl, 1 tbl, 1 ex, 3 dwg
FIELD: organic chemistry, in particular composition for corrosive and chemically stable coats.
SUBSTANCE: invention relates to alkyd-epoxy undercoat compositions based on debris from phthalic anhydride and epoxy resin distillation. Claimed composition contains (mass %) epoxydianic resin 45.0-45.4; modified alkyd resin obtained by stepwise esterification of sun flower oil, polyhydric alcohol and slop from phthalic anhydride distillation with grain-size classification of 0.05-1.1 mm and phthalic anhydride content of 37-80 % - 36.0-36.3; filler 4.9-5.5; pigment 3.5-3.8; balance: solvent; and over 100 mass % of composition it contains polyethylene polyamine as curing agent 15, and cobalt naphthenate as curing catalyst 1.8. Composition of present invention is useful in coating of metal parts and various constructions.
EFFECT: undercoat composition of high corrosion resistance, strength and lower cost.
2 tbl, 1 ex
FIELD: building materials.
SUBSTANCE: invention relates to a method for preparing compositions used for covers, among them to corrosion-water-fuel-resistant covers by nonferrous metals, concrete and ceramics in moisture and aggressive media. The composition comprises the following mass ratio of the parent components, %: film-forming mixture comprising oligomeric carboxyl-containing butadiene-nitrile rubber, 10.9-28.1 and epoxy-diane oligomer, 7.0-10.9 in the mass ratio of epoxy-diane oligomer and rubber from 19.9:80.1 to 50.0:50.0; hardening agent, 5.9-18.1; solvent, 41.0-51.1; filling agent, 1.4-1.6, and pigment, 13.6-16.4. Film-forming agent is heated preliminary at temperature 90-120°C to the conversion degree of carboxyl groups 8.8-25.2%. Mixture of γ- and β-aminopropyltriethoxysilanes is used as a hardening agent in the mass ratio = (67-75):(25-33), or 45-55% solutions of products of hydrolytic condensation of mixture of γ- and β-aminopropyltriethoxysilanes in cyclohexanone or toluene. Invention provides enhancing the strength of cover in direct/reverse impact, adhesion in moisture media, resistance to defoliation in storage and bending, to reduce swelling capacity in water.
EFFECT: improved, enhanced and valuable properties of composition.
2 tbl, 4 ex
FIELD: composition materials.
SUBSTANCE: invention relates to a method for preparing the composition cover that can be used for recovery worn out article surfaces working under conditions of high compression loadings, bearing surface of lateral framework in loading truck car in zone of slipping aperture. Method involves mixing the polymerizing epoxy composition and metallic dispersed filling agent in the ratio = (1:6)-(1:9) mas. p. p. Mixing is carried out at effect in increasing pressure in auger mixer with alternate step being each the following auger step differs from previous step by the constant value. Then the prepared composition is applied on metallic surface and kept its at the polymerization temperature up to finishing the solidification process. Composition based on epoxy resin ED-16, ED-20 with latent hardening agent dicyandiamide is used as epoxy composition. Iron powder PZH-4, iron-base powder PS 27-M, iron-base PG-USCH-35, nickel-base powder PG-SP2-M are used as a metallic dispersed filling agent. Invention provides enhancing the specific compression loading value.
EFFECT: improved method for preparing, valuable properties of cover.
5 cl, 1 tbl, 1 dwg, 6 ex
FIELD: metal-protecting materials.
SUBSTANCE: invention relates to protection of metals against corrosion using paint and varnish coatings. Invention proposes using as anticorrosive pigments co-precipitated manganite-phosphates, manganite-silicates, manganite-sulfates of metals of the general formula: MMnOxnMZ wherein M means Ca2+, Zn2+, Fe2+, Sr2+ at Z - PO4 3-, SiO3 2-, and M means Ba2+ at Z - SO4 2-, PO4 3-, SiO3 2-; x = 2.5-3; n = 0.5-10 with the content of co-precipitated manganite of corresponding metal from 5 to 70 wt.-% as anticorrosive pigments. Proposed pigments by their anticorrosive properties exceed that of zinc tetraoxychromate. Invention provides applying low toxic anticorrosive pigment-inhibitors with protective properties comparable with that of chromate pigments.
EFFECT: expanded assortment of anticorrosive pigments.
FIELD: polymeric protective coatings.
SUBSTANCE: invention relates to compositions forming anticorrosive coatings on reinforced concrete, concrete, and bricks and which, in particular, can be employed for anticorrosive protection of concrete floors, large-size metallic containers, pipelines, brick basements, bottoms, cattle-breeding farms, open-type swimming pools, and also air conduits, piping, and other metallic structures in industrial buildings, and near production enterprises producing corrosive emissions into atmosphere. Coating according to invention is composed by copolymer obtained via copolymerization of vinyl ether with methyl methacrylate at weight ratio (3-6):1 in presence of azo-bis-isobutyronitrile followed by dissolution of copolymer in toluene. Vaporization of the latter leaves film protecting surface from destruction.
EFFECT: enhanced protection efficiency.
FIELD: paint and varnish materials.
SUBSTANCE: invention relates to priming aqueous-dispersion compositions designated for protection metallic surfaces against corrosion in exploitation both under atmosphere conditions and subjected for effect of different liquids. Invention proposes anti-corrosive aqueous-dispersion priming-enamel comprising the following components, wt.-%: styrene-acrylic dispersion as a binding agent, 30-50; calcium molybdate phosphate as an anti-corrosive pigment in the following ratio of molybdate and phosphate ions from 1:0.01 to 1:100; color-forming pigment, 1-10; phosphate dispersing agent, 0.1-10; thickening agent, 0.05-0.2, and water, the balance. Applying calcium molybdate phosphate in priming-enamels provides the passivating activity in interaction 0f phosphate-molybdate ions with metallic backing of both ferrous and nonferrous metals and exhibits the additional protecting effect.
EFFECT: improved and valuable properties of compositions.